Vorster, H., F. Raal, J. Ubbink, A. Marais, M. Rajput, and F. Ntanios. “Functional Foods With Added Plant Sterols for Treatment of Hypercholesterolaemia and Prevention of Ischaemic Heart Disease”. South African Journal of Clinical Nutrition, 1, http://www.sajcn.co.za/index.php/SAJCN/article/view/54.